Yes I have a collection of schematic and software for the Tatung Einstein 256.
There is also an emulator for it.
More info at http://www.tatungeinstein.co.uk/
As its name suggests, Einstein 256 has 256K of RAM. Many computers that give you lots of memory don't really give the user any substantial benefits. This is not the case with Einstein 256. The memory is partitioned into 64K of CPU memory, and 192K of video RAM (VRAM).
* Display Processor : V9938
* Display Resolution : 512 x 424 pixels max (512 x 192 pixels from EBASIC)